.online {
    width: 1000px;
    height: 700px;
    margin: 50px auto;
    border: 1px solid red;
}

.online > div:first-child {
    padding: 15px;
    border-bottom: 1px solid red;
    color: #e69137;
    font-size: 20px;
    line-height: 20px;
}

.online > div:nth-child(2) > div:first-child {
    display: flex;
    justify-content: center;
    text-align: center;
    line-height: 40px;

}

.online > div:nth-child(2) > div > div > div {
    margin: 20px;
}

.online .first-span {
    font-size: 40px;
    color: #e69137;
}

.online > div:nth-child(2) > div:nth-child(2) {
    width: 600px;
    margin: auto;
}

.online input[type=text] {
    width: 600px;
    height: 40px;
    font-size: 30px;
    border: 1px dashed red;
    outline: none;
    padding: 0 10px;
}

.online textarea {
    width: 600px;
    height: 100px;
    border: 1px dashed red;
    font-size: 30px;
    outline: none;
}

.online > div:nth-child(2) {
    line-height: 40px;
}

.online input[type=button] {
    width: 200px;
    height: 40px;
    background-color: #e69137;
    color: white;
    border: 0;
    margin: 20px;
    cursor: pointer;
    outline: none;
}

.online > div:nth-child(2) > div:nth-child(2) > div:last-child {
    display: flex;
    justify-content: center;
}